UCC27511: The possibility of driving p-channel MOSFET

Shunsuke Yamamoto

Expert 4916 points

Part Number: UCC27511

Hi expert,

My customer is designing with UCC27511. My customer tries to use UCC27511 as a high side gate driver.

Therefore, UCC27511 has to drive p-channel MOSFET.

Is it possible that UCC27511 drive p-channel MOSFET?

If it is not possible, could you recommend any gate drivers that can drive p-channel MOSFET?

Best regards,

Shunsuke Yamamoto

over 1 year ago

0 Leslie Marquez over 1 year ago

TI__Genius 9301 points

Hi Shunsuke,

Our expert is currently out of the office and should get back to you within the next couple of days.

Best regards,

Leslie

0 Shunsuke Yamamoto over 1 year ago in reply to Leslie Marquez

TI__Expert 4916 points

How is this thread proceeding?
Best regards,

Shunsuke Yamamoto

+1 Alexander Mazany over 1 year ago in reply to Shunsuke Yamamoto

TI__Genius 11770 points

Hello Yamamoto-san,

We have an FAQ on driving P-channel MOSFETs linked here. To summarize, the UVLO features of our drivers pull the output to GND when the voltage falls below the threshold, which is usually the opposite of what is desired for PMOS. We have one driver called LM5111-4 which supports a high UVLO for PMOS purposes. Besides the UVLO issue, any driver should work.

There are other options for driving high-side switches such as half-bridge drivers, charge pumps, and floating power supplies which can all be used to drive a high-side NMOS instead of using PMOS. These are typically more popular, which is why there are less options for driving PMOS.

Anyways, it seems like LM5111-4 may be what your customer is looking for. Feel free to follow-up with any more questions.

Thanks,

Alex M.

Power management

Power management forum

UCC27511: The possibility of driving p-channel MOSFET